actix-website/examples/middleware/src/default_headers.rs

// <default-headers>
use actix_web::{http::Method, middleware, web, App, HttpResponse, HttpServer};

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| {
        App::new()
            .wrap(middleware::DefaultHeaders::new().add(("X-Version", "0.2")))
            .service(
                web::resource("/test")
                    .route(web::get().to(HttpResponse::Ok))
                    .route(web::method(Method::HEAD).to(HttpResponse::MethodNotAllowed)),
            )
    })
    .bind(("127.0.0.1", 8080))?
    .run()
    .await
}
// </default-headers>